S
M
T
W
T
F
S
29
70°
48°
30
69°
44°
1
66°
45°
2
70°
47°
3
70°
47°
4
69°
49°
5
69°
45°
6
68°
45°
7
66°
44°
8
67°
44°
9
68°
45°
10
67°
44°
11
65°
45°
12
66°
46°
13
69°
48°
14
70°
45°
15
70°
46°
16
69°
43°
17
68°
44°
18
66°
40°
19
63°
40°
20
62°
41°
21
62°
40°
22
63°
41°
23
63°
40°
24
64°
39°
25
62°
39°
26
63°
41°
27
62°
40°
28
63°
42°
29
64°
43°
30
66°
45°
31
65°
44°
1
63°
40°
2
63°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Pasadena
Pasadena's December 2026 forecast shows daily high temperatures ranging from 62° to 70°, with overnight lows between 39° and 49°. The average high for December is 66° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Pasadena. See also: January | February | March.
